linux-kernel - Re: [PATCH v6 5/5] vfio/pci: Implement VFIO_DEVICE_FEATURE_LOW_POWER_ENTRY_WITH

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Date:   Fri, 26 Aug 2022 20:00:41 +0530
From:   Abhishek Sahu <abhsahu@...dia.com>
To:     Alex Williamson <alex.williamson@...hat.com>
Cc:     Jason Gunthorpe <jgg@...dia.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Yishai Hadas <yishaih@...dia.com>,
        Shameer Kolothum <shameerali.kolothum.thodi@...wei.com>,
        Kevin Tian <kevin.tian@...el.com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Max Gurtovoy <mgurtovoy@...dia.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH v6 5/5] vfio/pci: Implement
 VFIO_DEVICE_FEATURE_LOW_POWER_ENTRY_WITH_WAKEUP

On 8/26/2022 4:02 AM, Alex Williamson wrote:
> On Thu, 18 Aug 2022 22:31:03 +0530
> Abhishek Sahu <abhsahu@...dia.com> wrote:
> 
>> On 8/17/2022 11:10 PM, Jason Gunthorpe wrote:
>>> On Wed, Aug 17, 2022 at 09:34:30PM +0530, Abhishek Sahu wrote:  
>>>> On 8/17/2022 7:23 PM, Jason Gunthorpe wrote:  
>>>>> On Wed, Aug 17, 2022 at 10:43:23AM +0530, Abhishek Sahu wrote:
>>>>>  
>>>>>> +static int
>>>>>> +vfio_pci_core_pm_entry_with_wakeup(struct vfio_device *device, u32 flags,
>>>>>> +				   void __user *arg, size_t argsz)  
>>>>>
>>>>> This should be
>>>>>   struct vfio_device_low_power_entry_with_wakeup __user *arg
>>>>>  
>>>>
>>>>  Thanks Jason.
>>>>
>>>>  I can update this.
>>>>
>>>>  But if we look the existing code, for example
>>>>  (vfio_ioctl_device_feature_mig_device_state()), then there it still uses
>>>>  'void __user *arg' only. Is this a new guideline which we need to take
>>>>  care ?  
>>>
>>> I just sent a patch that fixes that too
>>>   
>>
>>  Thanks for the update.
>>  I will change this. 
>>
>>>>  Do we need to keep the IOCTL name alphabetically sorted in the case list.
>>>>  Currently, I have added in the order of IOCTL numbers.  
>>>
>>> It is generally a good practice to sort lists of things.
>>>
>>> Jason  
>>
>>  Sure. I will make the sorted list.
> 
> The series looks good to me, so I'd suggest to rebase on Jason's
> patches[1][2] so you can easily sort out the above.  Thanks,
> 
> Alex
> 
> [1]https://lore.kernel.org/all/0-v1-da6fc51ee22e+562-vfio_pci_priv_jgg@nvidia.com/
> [2]https://lore.kernel.org/all/0-v1-11d8272dc65a+4bd-vfio_ioctl_split_jgg@nvidia.com/
> 

 Thanks Alex.
 I will rebase my patches to the above mentioned patch series
 and will send the updated patches.

 Regards,
 Abhishek